RU2298437C2 - Magnetic trap - Google Patents

Abstract

FIELD: magnetic traps, possibly extraction of ferromagnetic impurities out of flow of loose materials in chemical and other branches of industry.

SUBSTANCE: magnetic trap includes housing with magnetic system made of magnetic assemblies arranged with gap one relative to other and having enclosed in jackets permanent magnets. Magnetic trap is provided with cone splitter. Magnetic system is in the form of basket arranged coaxially relative to said splitter. Magnetic assembly is in the form of plate; permanent magnets are arranged in jacket in such a way that their similar poles are faced one to other. Housing is in the form of ring; side portion of basket is formed by means of vertical plates secured to upper cut portion of housing by their lower ends and arranged tangentially relative to vertical axis of said basket. Bottom part of basket is formed by means of plates secured to lower cut portion of housing and mounted by inclination angle relative to horizontal plane.

EFFECT: improved efficiency of extracting magnetic impurities out of flow of loose non-magnetic materials.

3 dwg

Description

The invention relates to magnetic traps and can be used to isolate ferromagnetic impurities from the flow of bulk material in chemical and other industries.

A device for cleaning bulk material from ferromagnetic impurities (AS USSR No. 1084072, IPC B03C 1/02, publ. 07.04.84), including a housing, a magnetic system and a screen having a hyperbolic profile and equipped with a groove. The magnetic system has a rotation mechanism. The device provides for the placement of several pairs of magnets, kinematically connected among themselves.

The disadvantages of this device are the design complexity due to the presence of the rotation mechanism of the magnets, and large overall dimensions, which limits its scope.

A known magnetic separator (AS USSR No. 526389, IPC V03C 1/02, publ. 30.08.76,), comprising a housing, a loading hopper and a magnetic system in the form of casings with magnets enclosed in them, and the casings with magnets are offset relative to each other in the horizontal plane (prototype).

The source material, when passing through the separator, bends around the housings with magnets located in them. In this case, ferromagnetic particles are attracted by magnets to the casing. After completion of the separation process, the separator is freed from ferromagnetic particles.

The disadvantages of this device are the uneven magnetic field due to the location of the magnets on the central axis of the separator, and the uneven "loading" of all the magnets in the path of movement of the bulk material. As a result, the efficiency of the separation process is low.

The problem solved by the invention is to increase the efficiency of separation of ferromagnetic impurities from bulk material by ensuring a uniform and maximum magnetic field, uniform distribution of bulk material across all magnetic assemblies and reducing the flux density of the bulk material.

The problem is solved in that a magnetic trap for separating ferromagnetic impurities from bulk material, including a housing with a magnetic system made of magnetic assemblies placed with a gap relative to each other, enclosed in permanent magnet housings, is equipped with a conical divider, and the magnetic system is designed as coaxial to the basket splitter.

The magnetic assembly is made in the form of a plate and contains permanent magnets located in the casing with the same poles to each other.

The casing is made in the form of a ring, the side of the basket is formed by vertical plates attached to the upper section of the casing with the lower end and installed tangentially relative to the vertical axis of the basket, and the bottom of the basket is formed by plates attached to the lower section of the casing and installed at an angle to the horizontal plane.

Figure 1 shows a longitudinal section of the proposed trap; figure 2 is a view a in figure 1 - from the input flange; figure 3 is a section bB in figure 2 is a longitudinal section of a magnetic assembly.

The magnetic trap contains a housing 1 made in the form of a ring of rectangular cross section, a conical divider 2, which is attached by ribs 3 to the inlet flange 4, with which the trap can be attached to a bunker (not shown in the figures) with bulk material, a magnetic system made in in the form of a basket 5, placed coaxially to the divider 2 and consisting of magnetic assemblies 6 placed with a gap 18. The magnetic assemblies are made in the form of plates.

Vertical magnetic assemblies 6 are attached to the upper cut 8 of the housing 1 by the lower end 9, which form the lateral part 7 of the basket 5. In the lower cut 10 of the housing 1, asymmetric wedge-shaped grooves 11 are made with an angle of 90 ° at the apex, in which magnetic are fixed at an angle to the horizontal plane assembly 6, forming the bottom part 16 of the basket 5 (see figure 1, 2). The grooves 11 in the lower slice 10 of the housing 1 determine the location of the magnetic assemblies 6, forming the bottom 16 of the basket 5, at an angle to the horizontal plane.

The upper parts 12 of the vertical magnetic assemblies 6, forming the side part 7 of the basket 5, are fixed in symmetrical wedge-shaped grooves 13 made in the input flange 4 with an angle at the apex of 90 °, evenly spaced around the circumference. The grooves 13 in the inlet flange 4 determine the tangential arrangement of the magnetic assemblies 6 forming the side surface 7 of the basket 5. The flange 4 has an inlet 17.

Magnetic assemblies are made in the form of casings 14 with permanent magnets 15 enclosed in them, while the permanent magnets 15 in the casings 14 are located with the same poles to each other (see Fig. 3).

Magnetic trap works as follows.

Bulk non-magnetic material containing ferromagnetic impurities through the inlet 17 of the flange 4 enters the trap, where, thanks to the divider 2, it is stratified in height. When moving along the divider 2, the flux density of the bulk material decreases, the bulk material is evenly distributed over all magnetic assemblies. The location of the magnetic assemblies in the form of a basket coaxial to the divider ensures uniform distribution of the magnetic field over the volume of the trap. Magnetic impurities are held by the magnetic field created by the permanent magnets 15 on the casings 14 of the magnetic assemblies 6, and bulk non-magnetic material through the gaps 18 between the assemblies 6 leaves their traps.

Thus, the simple and reliable design of the magnetic trap allows you to effectively separate magnetic impurities from the bulk material, creating a uniform and maximum magnetic field and a uniform distribution of bulk material across all magnetic assemblies.

Claims (1)

Magnetic trap for separating ferromagnetic impurities from bulk material, including a housing with a magnetic system made of magnetic assemblies placed with a gap relative to each other from permanent magnets enclosed in casings, characterized in that it is equipped with a conical divider, and the magnetic system is made in the form of placed coaxially the basket divider, while the magnetic assembly is made in the form of a plate, the permanent magnets are located in the casing with the same poles to each other, and the housing is made in the form of The front side of the basket is formed by vertical plates attached to the upper section of the casing with the lower end and installed tangentially relative to the vertical axis of the basket, and the bottom of the basket is formed by plates attached to the lower section of the casing and installed at an angle to the horizontal plane.

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